 function validate()
{

   if(trim(document.getElementById('username1').value) == '')
   {
      alert('Please enter your username');
      document.getElementById('username1').focus();
      return false;
   }

   else
   {
   document.getElementById('username1').value = trim(document.getElementById('username1').value);
   var numaric = document.getElementById('username1').value;
 		for(var j=0; j<numaric.length; j++)
 		{
 		 var alphaa = numaric.charAt(j);
 		 var hh = alphaa.charCodeAt(0);
 		 if((hh >64 && hh<91)||(hh>95 && hh<123)||(hh >47 && hh<58))
 		 {

 		 }
 		 else
 		 {
 		 alert("Enter the  alphabetic characters");
		 document.getElementById('username1').focus();
 		 return false;
 		 }
 		 }
   }

  if(trim(document.getElementById('password1').value) == '')
   {
      alert('Please enter your password');
      document.getElementById('password1').focus();
      return false;
   }
    else
   {
   document.getElementById('password1').value = trim(document.getElementById('password1').value);
   }

if(document.getElementById('password1').value.length<6)
 {
 alert("The password should not be less than 6 characters");
 document.getElementById('password1').focus();
 return false;
 }





    if(trim(document.getElementById('email').value) == '')
   {
      alert('Please enter your email');
      document.getElementById('email').focus();
      return false;
   }

    if(!isemail(trim(document.getElementById('email').value)))
   {
      alert('Email address is not valid');
      document.getElementById('email').focus();
      return false;
   }
   else
   {
   document.getElementById('email').value = trim(document.getElementById('email').value);
   }


}


function trim(str)
{
   return str.replace(/^\s+|\s+$/g,'');
}

function isemail(str)
{
	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}


